Scientific knowledge has its(6) .Many Question still cannot be answered using our present scientific knowledge？ 第六題點做？順便解釋一下?

Scientific knowledge (科學知識) has its limits (有其自身的限制 ==> 有很多現象之尚未被了解) .Many Question(許多問題) still(迄今) cannot be answered (無法被回答 ==>獲得解釋) using our(使用我們) present scientific knowledge(目前的科學知識)
科學知識本身因尚未完整的被了解(研究出來)，因此許多問題迄今使用目前有限的知識仍無法獲得解釋

Scientific knowledge have their limits and many questions still cannot be solved by using our present scientific methods. In my opinion, it is a matter of time; when our scientists devote themselves to explore and invent what are needed and useful for answering our purposes. Yip